The memorial is material and its construction, in order to enclosure the void. The structure of the Monument for the victims of the terror attacks in Madrid is a worldwide novelty. For the first time massive glass blocks are connected to form a structure using a transparent adhesive and no additional mechanical elements. The outer layer of the 11 meter tall monument consists out of approximate 15100 massive glass blocks, that are glued using just a transparent adhesive. The internal layer is made out of a over pressure stabilized ETFE foil. The interior void is the remembrance atmosphere space.